ASTM E1304-1997(2002) 金属材料平面变形(V型槽口)断裂韧度的测试方法(代替SAEARP1704)
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【英文标准名称】:StandardTestMethodforPlane-Strain(Chevron-Notch)FractureToughnessofMetallicMaterials
【原文标准名称】:金属材料平面变形(V型槽口)断裂韧度的测试方法(代替SAEARP1704)
【标准号】:ASTME1304-1997(2002)
【标准状态】:现行
【国别】:
【发布日期】:1997
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E08.02
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:试验;质量保证;金属;断裂试验
【英文主题词】:calibration-loadtestingmachines;loadtransducersformeasuringplanestrain(chevron-notch)fracture;toughnessofmetallicmaterials,test;chevronnotchedspecimen;cracking-crackgrowth;fracturetesting;loadingtests-metals/alloys;metalsandmetallicmaterials;smoothcrackgrowthdata;tension(tensile)properties/tests-tensilestrength
【摘要】:1.1Thistestmethodcoversthedeterminationofplane-strain(chevron-notch)fracturetoughnesses,KIvorKIvM,ofmetallicmaterials.Fracturetoughnessbythismethodisrelativetoaslowlyadvancingsteadystatecrackinitiatedatachevron-shapednotch,andpropagatinginachevron-shapedligament(Fig.1).Somemetallicmaterials,whentestedbythismethod,exhibitasporadiccrackgrowthinwhichthecrackfrontremainsnearlystationaryuntilacriticalloadisreached.Thecrackthenbecomesunstableandsuddenlyadvancesathighspeedtothenextarrestpoint.Forthesematerials,thistestmethodcoversthedeterminationoftheplane-strainfracturetoughness,KIvjorKIvM,relativetothecrackatthepointsofinstability.Note18212;OnedifferencebetweenthistestmethodandTestMethodE399(whichmeasuresKIc)isthatTestMethodE399centersattentiononthestartofcrackextensionfromafatigueprecrack.Thistestmethodmakesuseofeitherasteadystateslowlypropagatingcrack,oracrackattheinitiationofacrackjump.Althoughbothmethodsarebasedontheprinciplesoflinearelasticfracturemechanics,thisdifference,plusotherdifferencesintestprocedure,maycausethevaluesfromthistestmethodtobelargerthanKIcvaluesinsomematerials.Therefore,toughnessvaluesdeterminedbythistestmethodcannotbeusedinterchangeablywithKIc.1.2Thistestmethoduseseitherchevron-notchedrodspecimensofcircularcrosssection,orchevron-notchedbarspecimensofsquareorrectangularcrosssection(Figs.1-10).Theterms"shortrod"and"shortbar"areusedcommonlyforthesetypesofchevron-notchedspecimens.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H22
【国际标准分类号】:77_040_10
【页数】:11P.;A4
【正文语种】:
【原文标准名称】:金属材料平面变形(V型槽口)断裂韧度的测试方法(代替SAEARP1704)
【标准号】:ASTME1304-1997(2002)
【标准状态】:现行
【国别】:
【发布日期】:1997
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E08.02
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:试验;质量保证;金属;断裂试验
【英文主题词】:calibration-loadtestingmachines;loadtransducersformeasuringplanestrain(chevron-notch)fracture;toughnessofmetallicmaterials,test;chevronnotchedspecimen;cracking-crackgrowth;fracturetesting;loadingtests-metals/alloys;metalsandmetallicmaterials;smoothcrackgrowthdata;tension(tensile)properties/tests-tensilestrength
【摘要】:1.1Thistestmethodcoversthedeterminationofplane-strain(chevron-notch)fracturetoughnesses,KIvorKIvM,ofmetallicmaterials.Fracturetoughnessbythismethodisrelativetoaslowlyadvancingsteadystatecrackinitiatedatachevron-shapednotch,andpropagatinginachevron-shapedligament(Fig.1).Somemetallicmaterials,whentestedbythismethod,exhibitasporadiccrackgrowthinwhichthecrackfrontremainsnearlystationaryuntilacriticalloadisreached.Thecrackthenbecomesunstableandsuddenlyadvancesathighspeedtothenextarrestpoint.Forthesematerials,thistestmethodcoversthedeterminationoftheplane-strainfracturetoughness,KIvjorKIvM,relativetothecrackatthepointsofinstability.Note18212;OnedifferencebetweenthistestmethodandTestMethodE399(whichmeasuresKIc)isthatTestMethodE399centersattentiononthestartofcrackextensionfromafatigueprecrack.Thistestmethodmakesuseofeitherasteadystateslowlypropagatingcrack,oracrackattheinitiationofacrackjump.Althoughbothmethodsarebasedontheprinciplesoflinearelasticfracturemechanics,thisdifference,plusotherdifferencesintestprocedure,maycausethevaluesfromthistestmethodtobelargerthanKIcvaluesinsomematerials.Therefore,toughnessvaluesdeterminedbythistestmethodcannotbeusedinterchangeablywithKIc.1.2Thistestmethoduseseitherchevron-notchedrodspecimensofcircularcrosssection,orchevron-notchedbarspecimensofsquareorrectangularcrosssection(Figs.1-10).Theterms"shortrod"and"shortbar"areusedcommonlyforthesetypesofchevron-notchedspecimens.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H22
【国际标准分类号】:77_040_10
【页数】:11P.;A4
【正文语种】:
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